Swash plate pump of cleaning machine

Abstract

The utility model belongs to the technical field of water pumps, in particular to a swash plate pump of a cleaning machine, which comprises a cylinder body and a swash plate, the swash plate comprises a plate body and a connecting shaft, a connecting flange is arranged below the cylinder body, the plate body is arranged in the cylinder body, the connecting shaft is rotatably mounted in the connecting flange through an angular contact ball bearing, and an inner ring, an outer ring, a retainer and the connecting shaft are coaxially arranged. The upper surface of the connecting flange is concave downwards to form a mounting hole matched with the outer ring, the angular contact ball bearing abuts against the inner end face of the mounting hole for limiting, the connecting flange is made of aluminum and is formed in a die-casting mode, the height of the mounting hole is not smaller than two thirds of the height of the outer ring, the side wall of the upper end of the mounting hole is concave inwards to form a plurality of notches, and the notches are evenly distributed in the circumferential direction. A supporting block for supporting the outer ring is formed between every two adjacent notches. In the working process, the swash plate is stable in operation, free of shaking and stable in water pumping pressure, a gap is not prone to occurring between the connecting shaft and the oil seal, oil in the cylinder body is not prone to flowing out, and therefore the oil leakage phenomenon is not prone to occurring.

Description

Technical field:

[0001] The utility model belongs to the technical field of water pumps, in particular to a swash plate pump for a cleaning machine. Background technology:

[0002] Chinese utility model patent (publication number CN220909918U, application date 2023.10.18, publication date 2024.05.07) discloses a dual-bearing swash plate pump, including a swash plate pump, a cylinder assembly is fixedly arranged inside the swash plate pump, and the cylinder assembly is fixedly arranged with a cylinder mechanism. The cylinder mechanism includes a cylinder, an upper plane thrust ball bearing, a swash plate, a lower plane thrust ball bearing, a breathable cover, a blind cover, an O-ring, a rotary oil seal, and a bushing. The cylinder assembly is fixedly arranged with a cylinder, an upper plane thrust ball bearing is fixedly arranged inside the cylinder assembly, a swash plate is fixedly arranged inside the cylinder assembly, a lower plane thrust ball bearing is fixedly arranged inside the cylinder assembly, a breathable cover is fixedly arranged at the top of the cylinder assembly, a blind cover is fixedly arranged at the top of the cylinder assembly, an O-ring is fixedly arranged inside the cylinder assembly, a rotary oil seal is fixedly arranged inside the cylinder assembly, and a bushing is fixedly arranged inside the cylinder assembly.

[0003] The disadvantages of the above-mentioned swash plate pump are that the swash plate is rotatably mounted in the oil cylinder via a lower planar thrust ball bearing. The planar thrust ball bearing can only bear axial loads but not radial loads. The swash plate will shake during operation. On the one hand, the swash plate will vibrate and be unstable during operation, which in turn leads to unstable pumping pressure. On the other hand, a gap will appear between the bushing and the oil seal, and the oil in the cylinder will flow out through the gap, resulting in oil leakage. Summary of the invention:

[0004] The purpose of the utility model is to provide a swash plate pump for a cleaning machine, wherein the swash plate runs smoothly during operation without shaking, the pumping pressure is stable, and a gap is unlikely to appear between the connecting shaft and the oil seal, and the oil in the cylinder body is unlikely to flow out, thereby preventing oil leakage.

[0005] The utility model is achieved in this way:

[0006] A swash plate pump for a cleaning machine comprises a cylinder body and a swash plate, the swash plate comprising a plate body and a connecting shaft, a connecting flange being provided below the cylinder body, the plate body being arranged in the cylinder body, the connecting shaft being rotatably mounted in the connecting flange via an angular contact ball bearing, the angular contact ball bearing comprising an inner ring, an outer ring, a retaining frame and a rolling element, the inner ring, outer ring and retaining frame being coaxially arranged with the connecting shaft, the upper surface of the connecting flange being concave to form a mounting hole adapted for the outer ring, the angular contact ball bearing being positionally abutted against the inner end surface of the mounting hole, the connecting flange being made of aluminum and formed by die-casting, the height of the mounting hole being not less than 2 / 3 of the height of the outer ring, the upper end side wall of the mounting hole being concave to form a notch, a plurality of notches being evenly distributed around the circumference, and a support block for supporting the outer ring being formed between two adjacent notches.

[0007] In the above-mentioned swash plate pump of a cleaning machine, an oil seal sleeved on the outside of the connecting shaft is provided between the connecting flange and the connecting shaft. The oil seal is located below the angular contact ball bearing, and the inner hole of the connecting shaft is adapted to the motor shaft.

[0008] In the above-mentioned swash plate pump for a cleaning machine, both side walls of the support block are inclined surfaces that gradually tilt toward the middle from bottom to top.

[0009] In the above-mentioned swash plate pump for a cleaning machine, the height of the notch is greater than 1 / 3 of the height of the mounting hole and less than 2 / 3 of the height of the mounting hole.

[0010] In the above-mentioned swash plate pump of a cleaning machine, a sealing portion is provided at the upper end of the connecting flange and is sealed with the inner cavity of the cylinder body. An upper mounting plate is provided at the upper end of the connecting flange and a lower mounting plate is provided at the lower end. The upper mounting plate is located below the sealing portion and is fixedly mounted on the cylinder body. The lower mounting plate is mounted on the motor housing.

[0011] In the above-mentioned swash plate pump of a cleaning machine, a sealing ring is provided between the sealing portion and the cylinder body and is sleeved on the sealing portion.

[0012] In the above-mentioned swash plate pump for a cleaning machine, the cross section of the inner cavity of the cylinder body is circular, and the sealing portion is cylindrical.

[0013] In the above-mentioned swash plate pump of a cleaning machine, the upper mounting plate and the lower mounting plate are both square, upper through holes are respectively provided on the four corners of the upper mounting plate, lower through holes are respectively provided on the four corners of the lower mounting plate, and the four corners of the upper mounting plate are staggered with the four corners of the lower mounting plate.

[0014] In the above-mentioned swash plate pump of a cleaning machine, the screw passes through the upper through hole and is screwed to the cylinder body, and the screw passes through the lower through hole and is screwed to the cylinder body.

[0015] In the above-mentioned swash plate pump for a cleaning machine, the four corners of the upper mounting plate and the four corners of the lower mounting plate are staggered by 45 degrees.

[0016] The outstanding advantages of the utility model compared with the prior art are:

[0017] 1. The connecting shaft of the utility model is rotatably mounted in the connecting flange via an angular contact ball bearing. The inner ring, outer ring, and retainer are coaxially arranged with the connecting shaft. The angular contact ball bearing can simultaneously bear axial and radial loads. The swash plate operates smoothly during operation without shaking, and the pumping pressure is stable. In addition, it is unlikely that a gap will appear between the connecting shaft and the oil seal, and the oil in the cylinder body will not easily flow out, thus preventing oil leakage. At the same time, the provision of notches and support blocks can effectively reduce the generation of internal pores during die-casting of the connecting flange while ensuring the installation strength of the angular contact ball bearing, thereby preventing oil leakage at the pores after the connecting flange is machined.

[0018] 2. The upper mounting plate and the lower mounting plate of the present invention are both square. Upper through holes are respectively provided on the four corners of the upper mounting plate, and lower through holes are respectively provided on the four corners of the lower mounting plate. The four corners of the upper mounting plate and the four corners of the lower mounting plate are staggered to avoid interference with the screwdriver during installation, which facilitates the installation of the connecting flange. Description of the drawings:

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model;

[0021] Figure 3 It is a three-dimensional diagram of the utility model without the cylinder body;

[0022] Figure 4 It is a three-dimensional diagram of the utility model without the cylinder block and the swash plate;

[0023] Figure 5 It is a three-dimensional diagram of the connecting flange of the utility model.

[0024] Figure numerals: 1. cylinder block; 2. swash plate; 2a. plate body; 2b. connecting shaft; 3. connecting flange; 4. angular contact ball bearing; 4a. inner ring; 4b. outer ring; 4c. retaining rack; 4d. rolling element; 5. mounting hole; 6. notch; 7. support block; 8. sealing part; 9. upper mounting plate; 10. lower mounting plate; 11. upper through hole; 12. lower through hole; 13. oil seal. Specific implementation method:

[0025] The present invention is further described below with reference to specific embodiments. Figure 1 —5:

[0026] A swash plate pump for a cleaning machine includes a cylinder body 1 and a swash plate 2. The swash plate 2 includes a plate body 2a and a connecting shaft 2b. A connecting flange 3 is provided below the cylinder body 1. The plate body 2a is disposed within the cylinder body 1. The connecting shaft 2b is rotatably mounted within the connecting flange 3 via an angular contact ball bearing 4. The angular contact ball bearing 4 includes an inner ring 4a, an outer ring 4b, a retainer 4c, and rolling elements 4d. The inner ring 4a, outer ring 4b, and retainer 4c are coaxially disposed with the connecting shaft 2b. The upper surface of the connecting flange 3 is concave to form a mounting hole 5 that matches the outer ring 4b. The angular contact ball bearing 4 abuts against the inner end surface of the mounting hole 5, ensuring positional stability. An oil seal 13, fitted over the outer surface of the connecting shaft 2b, is installed between the connecting flange 3 and the connecting shaft 2b. The oil seal 13 is located below the angular contact ball bearing 4. The inner bore of the connecting shaft 2b mates with the motor shaft. The connecting flange 3 is die-cast aluminum. The height of the mounting hole 5 is no less than two-thirds the height of the outer ring 4b. The upper sidewall of the mounting hole 5 is concave, forming notches 6. Multiple notches 6 are evenly distributed around the circumference, with support blocks 7 between adjacent notches 6 to support the outer ring 4b. In this embodiment, the depth of the mounting hole 5 is equal to the height of the outer ring 4b.

[0027] like Figure 1-5 As shown, the connecting shaft 2b of the present invention is rotatably mounted within the connecting flange 3 via an angular contact ball bearing 4. The inner ring 4a, outer ring 4b, and retainer 4c are coaxially arranged with the connecting shaft 2b. The angular contact ball bearing 4 can simultaneously withstand axial and radial loads. The swash plate 2 operates smoothly and without shaking during operation, ensuring stable pumping pressure. A gap is unlikely to form between the connecting shaft 2b and the oil seal 13, preventing oil from escaping from the cylinder body 1 and, consequently, oil leakage. Furthermore, the provision of the notch 6 reduces the thickness of the connecting flange 3, thereby minimizing the generation of internal pores during die-casting of the connecting flange 3 and preventing oil leakage from the pores after machining. The provision of the support block 7 effectively supports the outer ring 4b, thereby ensuring the installation strength of the angular contact ball bearing 4 and enabling the angular contact ball bearing 4 to withstand radial loads.

[0028] The utility model is suitable for working conditions of medium and low operating temperatures, relatively high rotation speeds and heavy loads.

[0029] Preferably, the model of the angular contact ball bearing 4 is 6207, which can bear radial and axial loads.

[0030] In order to increase the width of the gap 6 as much as possible while ensuring the supporting strength of the support block 7, the two side walls of the support block 7 are inclined surfaces that gradually tilt toward the middle from bottom to top, such as Figure 5 shown.

[0031] In order to ensure the supporting strength of the connecting flange 3 while minimizing the occurrence of air holes, the height of the notch 6 is greater than 1 / 3 of the height of the mounting hole 5 and less than 2 / 3 of the height of the mounting hole 5. In this embodiment, the height of the notch 6 is equal to 1 / 2 of the height of the mounting hole 5.

[0032] The installation structure of the connecting flange 3: Figure 1-5 As shown, the upper end of the connecting flange 3 is provided with a sealing portion 8 that is sealed with the inner cavity of the cylinder body 1, the upper end of the connecting flange 3 is provided with an upper mounting plate 9, and the lower end is provided with a lower mounting plate 10, the upper mounting plate 9 is located below the sealing portion 8, and the upper mounting plate 9 is fixedly mounted on the cylinder body 1, and the lower mounting plate 10 is mounted on the motor housing.

[0033] Furthermore, the screw passes through the upper through hole 11 and is screwed to the cylinder body 1 , and the screw passes through the lower through hole 12 and is screwed to the cylinder body 1 .

[0034] In order to facilitate the installation of the connecting flange 3, as Figure 1 、 3 -5, the upper mounting plate 9 and the lower mounting plate 10 are both square, the four corners of the upper mounting plate 9 are respectively provided with upper through holes 11, and the four corners of the lower mounting plate 10 are respectively provided with lower through holes 12. The four corners of the upper mounting plate 9 and the four corners of the lower mounting plate 10 are staggered to avoid interference between the screwdriver and the lower mounting plate 10 when the upper mounting plate 9 is installed on the cylinder body 1, and interference between the screwdriver and the upper mounting plate 9 when the lower mounting plate 10 is installed on the motor housing.

[0035] In order to achieve a better sealing effect, a sealing ring is provided between the sealing portion 8 and the cylinder body 1 and is sleeved on the sealing portion 8 .

[0036] Furthermore, the cross section of the inner cavity of the cylinder body 1 is circular, and the sealing portion 8 is cylindrical.

[0037] Preferably, the four corners of the upper mounting plate 9 and the four corners of the lower mounting plate 10 are staggered by 45 degrees.

[0038] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A swash plate pump for a cleaning machine, comprising a cylinder (1) and a swash plate (2), wherein the swash plate (2) comprises a plate body (2a) and a connecting shaft (2b), characterized in that: A connecting flange (3) is provided below the cylinder body (1), the disc body (2a) is arranged in the cylinder body (1), and the connecting shaft (2b) is rotatably mounted in the connecting flange (3) via an angular contact ball bearing (4), the angular contact ball bearing (4) comprising an inner ring (4a), an outer ring (4b), a retaining frame (4c) and a rolling element (4d), the inner ring (4a), the outer ring (4b), the retaining frame (4c) and the connecting shaft (2b) being coaxially arranged, and the upper surface of the connecting flange (3) The mounting hole (5) is formed by a concave portion and matches the outer ring (4b). The angular contact ball bearing (4) is limited by the inner end surface of the mounting hole (5). The connecting flange (3) is made of aluminum and is formed by die-casting. The height of the mounting hole (5) is not less than 2 / 3 of the height of the outer ring (4b). The upper end side wall of the mounting hole (5) is concave to form a notch (6). There are multiple notches (6) evenly distributed around the circumference, and a support block (7) for supporting the outer ring (4b) is formed between two adjacent notches (6).

2. The swash plate pump for a cleaning machine according to claim 1, characterized in that: The two side walls of the support block (7) are inclined surfaces that gradually tilt toward the middle from bottom to top.

3. The swash plate pump for a cleaning machine according to claim 1, characterized in that: The height of the notch (6) is greater than 1 / 3 of the height of the mounting hole (5) and less than 2 / 3 of the height of the mounting hole (5).

4. The swash plate pump for a cleaning machine according to claim 1, characterized in that: The upper end of the connecting flange (3) is provided with a sealing portion (8) sealedly connected to the inner cavity of the cylinder body (1), the upper end of the connecting flange (3) is provided with an upper mounting plate (9), and the lower end is provided with a lower mounting plate (10), the upper mounting plate (9) is located below the sealing portion (8), and the upper mounting plate (9) is fixedly mounted on the cylinder body (1), and the lower mounting plate (10) is mounted on the motor housing.

5. The swash plate pump for a cleaning machine according to claim 4, characterized in that: The upper mounting plate (9) and the lower mounting plate (10) are both square, the four corners of the upper mounting plate (9) are respectively provided with upper through holes (11), the four corners of the lower mounting plate (10) are respectively provided with lower through holes (12), and the four corners of the upper mounting plate (9) and the four corners of the lower mounting plate (10) are staggered.

6. The swash plate pump for a cleaning machine according to claim 5, characterized in that: The four corners of the upper mounting plate (9) and the four corners of the lower mounting plate (10) are staggered by 45 degrees.

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